Tds deduction under reverse charge method

I am presenting three situation, would like openion of forum  on the same

1) Bill for Car Hire Amount Rs 5000 no Tax is charges by service provider in Bill...How much payment to be made to service provider. What is the TDS to be deducted while making payment

2) Bill for Car Hire amounts to Rs 5000.Service Provider has charges full tax @ 12.36% apart from amount of Rs 5000. How much payment to be made to service Provider & what shoulld be TDS Amount

3) Bill for Car Hire amounts to Rs 5000. Service provider has charged tax @ 12.36% & has deducted from this amount service tax pertaining to Service receiver.What amout to be paid to service Provider & what should be TDS deduction.